<%-- 
    Document   : UploadPage
    Created on : Feb 25, 2012, 1:48:40 PM
    Author     : David Hudson
--%>

<%@ page import="java.io.*" %>
<%
    /*Uploading based on example at 
    http://www.roseindia.net/jsp/file_upload/Sinle_upload.xhtml.shtml*/
    //to get the content type information from JSP Request Header
    String contentType = request.getContentType();
    /*here we are checking the content type is not equal to Null and as 
    well as the passed data from mulitpart/form-data is greater than or
    equal to 0*/
    if((contentType != null) && (contentType.indexOf("multipart/form-data")>= 0)) 
    {
        DataInputStream in = new DataInputStream(request.getInputStream());
        //we are taking the length of Content type data
        int formDataLength = request.getContentLength();
        byte dataBytes[] = new byte[formDataLength];
        int byteRead = 0;
        int totalBytesRead = 0;
        //this loop converting the uploaded file into byte code
        while (totalBytesRead < formDataLength) 
        {
            byteRead = in.read(dataBytes, totalBytesRead, formDataLength);
            totalBytesRead += byteRead;
        }
        String file = new String(dataBytes);
        //for saving the file name
        String saveFile = file.substring(file.indexOf("filename=\"") + 10);
        saveFile = saveFile.substring(0, saveFile.indexOf("\n"));
        saveFile = saveFile.substring(saveFile.lastIndexOf("\\") + 1,saveFile.indexOf("\""));
        int lastIndex = contentType.lastIndexOf("=");
        String boundary = contentType.substring(lastIndex + 1,contentType.length());
        int pos;
        //extracting the index of file 
        pos = file.indexOf("filename=\"");
        pos = file.indexOf("\n", pos) + 1;
        pos = file.indexOf("\n", pos) + 1;
        pos = file.indexOf("\n", pos) + 1;
        int boundaryLocation = file.indexOf(boundary, pos) - 4;
        int startPos = ((file.substring(0, pos)).getBytes()).length;
        int endPos = ((file.substring(0, boundaryLocation)).getBytes()).length;
        //creating a new file with the same name and writing the content in new file
        saveFile = System.getProperty("user.dir")+"\\upload\\"+saveFile;
        FileOutputStream fileOut = new FileOutputStream(saveFile);
        fileOut.write(dataBytes, startPos, (endPos - startPos));
        fileOut.flush();
        fileOut.close();
%>
    <Br><table border="2"><tr><td><b>Upload complete for:</b><% out.println(saveFile); %></td></tr></table> 
<%
    }
       else
       {
%>
    <Br><table border="2"><tr><td><b>No file was uploaded, did you reach this page in error?</b>
<%
       }
    //Upload complete, we can start trying to deal with parsing:
%>
<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>Upload Status</title>
    </head>
    <body> 
    </body>
</html>
